Silicon has a preference in IC technology because

Silicon has a preference in IC technology because 

(a) it is an indirect semiconductor (b) it is a covalent semiconductor (c) it is an elemental semiconductor (d) of the availability of nature oxide SiO
by

1 Answer

Answer :

Silicon has a preference in IC technology because of the availability of nature oxide SiO

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Related questions

Impurity atoms to be added to pure silicon in order to make a p-type semiconductor belongs to

Description : Impurity atoms to be added to pure silicon in order to make a p-type semiconductor belongs to (a) Phosphorous (b) Boron (c) Antimony (d) Aluminium 

Last Answer : Boron  , a  group  three  element.

Pure silicon is

Description : Pure silicon is (a) a p-type semiconductor (b) an n-type semiconductor (c) an intrinsic semiconductor (d) an extrinsic semiconductor 

Last Answer : Pure  silicon  is  an  intrinsic  semiconductor because  its  own  electrons   are  responsible   for   conduction.

Gold is often diffused into silicon PN junction devices to

Description : Gold is often diffused into silicon PN junction devices to   (A) increase the recombination rate (B) reduce the recombination rate (C) make silicon a direct gap semiconductor (D) make silicon semi-metal

Last Answer : To  increase  the  combinational  rate  at  the  pn  junction

The Maximum spectral response of the germanium and silicon is in the

Description : The Maximum spectral response of the germanium and silicon is in the   (A) infrared region (B) ultraviolet region (C) visible region (D) x-ray region

Last Answer : The Maximum spectral response of the germanium and silicon is in the ultraviolet region

Which of the following serves as donor impurity in Silicon?

Description : Which of the following serves as donor impurity in Silicon?  (A) Boron (B) Indium (C) Germanium (D) Antimony 

Last Answer : Which of the following will serve as a donor impurity in silicon?   (A) Boron (B) Indium (C) Germanium (D) Antimony

At room temperature, an intrinsic silicon crystal acts approximately as ……

Last Answer : At room temperature, an intrinsic silicon crystal acts approximately as An insulator.

‘IC chips’ for computers are usually made of (a) lead (b) silicon (c) chromium (d) gold

Description : ‘IC chips’ for computers are usually made of (a) lead (b) silicon (c) chromium (d) gold

Last Answer : Ans:(b)

The ‘IC’ chips used in computers are made of (a) chromium (b) iron oxide (c) alumina (d) silicon

Description : The ‘IC’ chips used in computers are made of (a) chromium (b) iron oxide (c) alumina (d) silicon

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IC chips used in computers are usually made of 1) Lead 2) Silicon 3) Chromium 4) Gold

Description : IC chips used in computers are usually made of 1) Lead 2) Silicon 3) Chromium 4) Gold

Last Answer : 2) Silicon

‘IC-Chips’ for computer are usually made of (1) Silicon (2) Lead (3) Chromium (4) Gold

Description : ‘IC-Chips’ for computer are usually made of (1) Silicon (2) Lead (3) Chromium (4) Gold

Last Answer : Silicon

Most of the transistors are NPN type and not PNP type because

Description : Most of the transistors are NPN type and not PNP type because  1.NPN transistor gives large voltage gain 2.NPN transistors are more negative than PNP transistors 3.In NPN transistor, the current ... free electrons which are less mobiles than holes 4.We can have high conduction is NPN transistors 

Last Answer : Most of the transistors are NPN type and not PNP type because We can have high conduction is NPN transistors 

Helium - oxygen mixture is used by deep sea divers in preference to nitrogen-oxygen mixture, because

Description : Helium - oxygen mixture is used by deep sea divers in preference to nitrogen-oxygen mixture, because

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In preference to nitrogen -oxygen mixture (present in air), a helium -oxygen mixture is used by divers in deep sea because helium (a) is less toxic than nitrogen (b) can readily mix with oxygen than nitrogen (c) is lighter than nitrogen (d) is less soluble in blood than nitrogen at high pressure under the sea

Description : In preference to nitrogen -oxygen mixture (present in air), a helium -oxygen mixture is used by divers in deep sea because helium (a) is less toxic than nitrogen (b) can readily mix with oxygen ... ) is lighter than nitrogen (d) is less soluble in blood than nitrogen at high pressure under the sea

Last Answer : Ans:(d)

Bryophytes are often called as amphibian plant because they : (1) appear like frog (2) are found both in water and on land (3) do not have habitat preference (4) can eat insects

Description : Bryophytes are often called as amphibian plant because they : (1) appear like frog (2) are found both in water and on land (3) do not have habitat preference (4) can eat insects

Last Answer : (2) are found both in water and on land Explanation: Bryophytes are simple low growing plants, anchored to the ground or to tree bark by tiny filamentous rhizoids.

Bryophytes are often called as amphibian plant because they : (1) appear like frog (2) are found both in water and on land (3) do not have habitat preference (4) can eat insects

Description : Bryophytes are often called as amphibian plant because they : (1) appear like frog (2) are found both in water and on land (3) do not have habitat preference (4) can eat insects

Last Answer : are found both in water and on land

Mark the incorrect option relating to the knowledge and experience of the CIC/IC a) Law, science and technology b) Social service & management c) Journalism , mass media d) Cinema and Politics

Description : Mark the incorrect option relating to the knowledge and experience of the CIC/IC a) Law, science and technology b) Social service & management c) Journalism , mass media d) Cinema and Politics

Last Answer : d) Cinema and Politics 

Prosthetic Devices includes i) Computer technology for vision and hearing ii) Powerful IC iii) MRI Systems iv) None of these

Description : Prosthetic Devices includes i) Computer technology for vision and hearing ii) Powerful IC iii) MRI Systems iv) None of these

Last Answer : i) Computer technology for vision and hearing

The new technology which is emerging in the field of computer is (1) IC-technology (2) Parallel processing system (3) Semiconductor technology (4) Transistor technology

Description : The new technology which is emerging in the field of computer is (1) IC-technology (2) Parallel processing system (3) Semiconductor technology (4) Transistor technology

Last Answer : Transistor technology

In a single crystal of an intrinsic semiconductor, the number of free carriers at the Fermi level at room

Description : In a single crystal of an intrinsic semiconductor, the number of free carriers at the Fermi level at room temperature is: A) Half the total number of electrons in the crystal B) Zero C) Half the number of atoms in the crystal D) Half the number of free electrons in the crystal

Last Answer : In a single crystal of an intrinsic semiconductor, the number of free carriers at the Fermi level at room temperature is: Zero 

In case of semi-conductors, the ratio of conduction current to displacement current is:

Description :  In case of semi-conductors, the ratio of conduction current to displacement current is: A) more than 200 and less than 1000 B) less than 100 but greater than 1/100 C) less than 1/100 D) more than 1000

Last Answer : In case of semi-conductors, the ratio of conduction current to displacement current is:  less than 100 but greater than 1/100

In an n-type semiconductor, as the donor concentration ND increases, the Fermi level EF:

Description : In an n-type semiconductor, as the donor concentration ND increases, the Fermi level EF: (1) Remains unaltered (2) Moves towards the conduction band (3) Move towards the center of forbidden energy gap (4) May or may not move depending on temperature 

Last Answer : In an n-type semiconductor, as the donor concentration ND increases, the Fermi level EF: Moves towards the conduction band

The following property of semiconductors cannot be determined from Hall effect:

Description : The following property of semiconductors cannot be determined from Hall effect: (1) Semiconductor is n–type or p–type (2) The carrier concentration (3) The mobility of semiconductor (4) The atomic concentration of semiconductor

Last Answer : The following property of semiconductors cannot be determined from Hall effect: The atomic concentration of semiconductor

The advantage of a semiconductor strain gauge cover the wire round strain gauge is that

Description : The advantage of a semiconductor strain gauge cover the wire round strain gauge is that

Last Answer : The advantage of a semiconductor strain gauge cover the wire round strain gauge is that it is more sensitive

The semiconductor used for LEDs emitting in the visible range is

Description : The semiconductor used for LEDs emitting in the visible range is  (a) GaAs (b) GaAlAs (c) GalnAs (d) GaAsP

Last Answer : The semiconductor used for LEDs emitting in the visible range is GaAsP

The polar bonds existing in III-V compound semiconductor, may be considered as equivalent to

Description : The polar bonds existing in III-V compound semiconductor, may be considered as equivalent to  (a) 1 ionic bond and 3 covalent bonds (b) 1 ionic bond and 4 covalent bonds (c) 2 ionic bonds and 2 covalent bonds (d) 2 ionic bonds and 4 covalent bonds

Last Answer : The polar bonds existing in III-V compound semiconductor, may be considered as equivalent to 1 ionic bond and 3 covalent bonds

The material used for ‘doping’ to prepare N - type semiconductor is

Description : The material used for ‘doping’ to prepare N - type semiconductor is

Last Answer : The material used for ‘doping’ to prepare N - type semiconductor is Arsenic

When reverse bias is applied to a junction diode, it

Description : When reverse bias is applied to a junction diode, it  1.increases the potential barrier 2.decreases the potential barrier 3.greatly increases the minority carrier current 4.greatly increases the majority carrier current 

Last Answer : When reverse bias is applied to a junction diode, it increases the potential barrier 

When a P - N junction is forward biased

Description : When a P - N junction is forward biased  1.only electrons in N-region are injected into P-region 2.only holes in P-region are injected into N-region 3.majority carriers in each region are injected into the other region 4.minority current is reduced to zero 

Last Answer : When a P - N junction is forward biased majority carriers in each region are injected into the other region 

While comparing doped semiconductor vs. un-doped semiconductor, which of the following

Description : While comparing doped semiconductor vs. un-doped semiconductor, which of the following statements is NOT true ? (A) Doped semiconductor has smaller band-gap compared to un-doped semiconductor (B) ... to un-doped semiconductor (D) Doped as well as un-doped semiconductor have equal bandwidth

Last Answer : While comparing doped semiconductor vs. un-doped semiconductor, which of the following statements is NOT true ? (A) Doped semiconductor has smaller band-gap compared to un-doped semiconductor (B) ... to un-doped semiconductor (D) Doped as well as un-doped semiconductor have equal bandwidth

To increase mobility of electron in a given piece of semiconductor

Description : To increase mobility of electron in a given piece of semiconductor (A) Increase overall size of the semiconductor (B) Increase length (C) Increase width (D) Small increase in temperature above room temperature value

Last Answer : To increase mobility of electron in a given piece of semiconductor Small increase in temperature above room temperature value

In a P-N diode, assume that P-side is lightly doped and N-side is heavily doped. Based on this

Description : In a P-N diode, assume that P-side is lightly doped and N-side is heavily doped. Based on this information, which of the following statement is true ? (A) Depletion region is more extended in ... (C) Depletion region would be equal on both sides (D) Not enough information provided to give answer

Last Answer : In a P-N diode, assume that P-side is lightly doped and N-side is heavily doped. Based on this information, which of the following statement is true ? (A) Depletion region is more extended ... (C) Depletion region would be equal on both sides (D) Not enough information provided to give answer

Space charge region or depletion region in a P-N diode has

Description : Space charge region or depletion region in a P-N diode has (A) No charge (B) No fixed charge (C) No mobile charge (D) Both fixed and mobile charges

Last Answer : Space charge region or depletion region in a P-N diode has No mobile charge

At room temperature in an intrinsic piece of Si there could be

Description : At room temperature in an intrinsic piece of Si there could be (A) No free carriers (B) Some electrons but no holes (C) Some holes but no electrons (D) Equal number of holes and electrons

Last Answer : No  free   carriers.

At absolute temperature, an intrinsic semiconductor has ……….

Last Answer : At absolute temperature, an intrinsic semiconductor has No holes or free electrons.

At room temperature, an intrinsic semiconductor has ……….

Last Answer : At room temperature, an intrinsic semiconductor has A few free electrons and holes.

In an intrinsic semiconductor, the number of free electrons ………

Last Answer :  In an intrinsic semiconductor, the number of free electrons Equals the number of holes.

The leakage current in a pn junction is of the order of

Description : The leakage current in a pn junction is of the order of

Last Answer : The leakage current in a pn junction is of the order of µA.

With forward bias to a pn junction , the width of depletion layer ………

Last Answer : With forward bias to a pn junction , the width of depletion layer Decreases.

When the temperature of an extrinsic semiconductor is increased, the pronounced effect is on……

Last Answer : When the temperature of an extrinsic semiconductor is increased, the pronounced effect is on Minority carriers.

The leakage current across a pn junction is due to …………..

Last Answer : The leakage current across a pn junction is due to Minority carriers.

A pn junction acts as a ……….

Last Answer : A pn junction acts as a Unidirectional switch.

A reverse bias pn junction has …………

Last Answer : A reverse bias pn junction has Almost no current.

In the depletion region of a pn junction, there is a shortage of ……..

Last Answer : In the depletion region of a pn junction, there is a shortage of Holes and electrons.

The battery connections required to forward bias a pn junction are ……

Last Answer : The battery connections required to forward bias a pn junction are +ve terminal to p and –ve terminal to n.

The random motion of holes and free electrons due to thermal agitation is called ……….

Last Answer : The random motion of holes and free electrons due to thermal agitation is called Diffusion.

In a semiconductor, current conduction is due to ……..

Last Answer : In a semiconductor, current conduction is due to Holes and free electrons.

A hole and electron in close proximity would tend to ……….

Last Answer : A hole and electron in close proximity would tend to Attract each other.

As the doping to a pure semiconductor increases, the bulk resistance of the semiconductor ………..

Last Answer : As the doping to a pure semiconductor increases, the bulk resistance of the semiconductor Decreases.

The impurity level in an extrinsic semiconductor is about ….. of pure semiconductor.

Last Answer : The impurity level in an extrinsic semiconductor is about 1 atom for 108 atoms of pure semiconductor.

A hole in a semiconductor is defined as …………….

Last Answer : A hole in a semiconductor is defined as The incomplete part of an electron pair bond.